//// Copyright (C) 2004-2021 Artifex Software, Inc.
////
//// This file is part of MuPDF.
////
//// MuPDF is free software: you can redistribute it and/or modify it under the
//// terms of the GNU Affero General Public License as published by the Free
//// Software Foundation, either version 3 of the License, or (at your option)
//// any later version.
////
//// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
//// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
//// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
//// details.
////
//// You should have received a copy of the GNU Affero General Public License
//// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
////
//// Alternative licensing terms are available from the licensor.
//// For commercial licensing, see <https://www.artifex.com/> or contact
//// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
//// CA 94129, USA, for further information.
//
//#include "mupdf/fitz.h"
//
//#include <assert.h>
//#include <string.h>
//
//typedef struct {
//	fz_band_writer super;
//	fz_pwg_options pwg;
//} pwg_band_writer;
//
//void
//fz_write_pwg_file_header(fz_context *ctx, fz_output *out)
//{
//	static const unsigned char pwgsig[4] = { 'R', 'a', 'S', '2' };
//
//	/* Sync word */
//	fz_write_data(ctx, out, pwgsig, 4);
//}
//
//static void
//pwg_page_header(fz_context *ctx, fz_output *out, const fz_pwg_options *pwg,
//		int xres, int yres, int w, int h, int bpp)
//{
//	static const char zero[64] = { 0 };
//	int i;
//
//	/* Page Header: */
//	fz_write_data(ctx, out, pwg ? pwg->media_class : zero, 64);
//	fz_write_data(ctx, out, pwg ? pwg->media_color : zero, 64);
//	fz_write_data(ctx, out, pwg ? pwg->media_type : zero, 64);
//	fz_write_data(ctx, out, pwg ? pwg->output_type : zero, 64);
//	fz_write_int32_be(ctx, out, pwg ? pwg->advance_distance : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->advance_media : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->collate : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->cut_media : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->duplex : 0);
//	fz_write_int32_be(ctx, out, xres);
//	fz_write_int32_be(ctx, out, yres);
//	/* CUPS format says that 284->300 are supposed to be the bbox of the
//	 * page in points. PWG says 'Reserved'. */
//	for (i=284; i < 300; i += 4)
//		fz_write_data(ctx, out, zero, 4);
//	fz_write_int32_be(ctx, out, pwg ? pwg->insert_sheet : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->jog : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->leading_edge : 0);
//	/* CUPS format says that 312->320 are supposed to be the margins of
//	 * the lower left hand edge of page in points. PWG says 'Reserved'. */
//	for (i=312; i < 320; i += 4)
//		fz_write_data(ctx, out, zero, 4);
//	fz_write_int32_be(ctx, out, pwg ? pwg->manual_feed : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->media_position : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->media_weight : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->mirror_print : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->negative_print : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->num_copies : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->orientation : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->output_face_up : 0);
//	fz_write_int32_be(ctx, out, w * 72/ xres);	/* Page size in points */
//	fz_write_int32_be(ctx, out, h * 72/ yres);
//	fz_write_int32_be(ctx, out, pwg ? pwg->separations : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->tray_switch : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->tumble : 0);
//	fz_write_int32_be(ctx, out, w); /* Page image in pixels */
//	fz_write_int32_be(ctx, out, h);
//	fz_write_int32_be(ctx, out, pwg ? pwg->media_type_num : 0);
//	fz_write_int32_be(ctx, out, bpp < 8 ? 1 : 8); /* Bits per color */
//	fz_write_int32_be(ctx, out, bpp); /* Bits per pixel */
//	fz_write_int32_be(ctx, out, (w * bpp + 7)/8); /* Bytes per line */
//	fz_write_int32_be(ctx, out, 0); /* Chunky pixels */
//	switch (bpp)
//	{
//	case 1: fz_write_int32_be(ctx, out, 3); /* Black */ break;
//	case 8: fz_write_int32_be(ctx, out, 18); /* Sgray */ break;
//	case 24: fz_write_int32_be(ctx, out, 19); /* Srgb */ break;
//	case 32: fz_write_int32_be(ctx, out, 6); /* Cmyk */ break;
//	default: fz_throw(ctx, FZ_ERROR_ARGUMENT, "pixmap bpp must be 1, 8, 24 or 32 to write as pwg");
//	}
//	fz_write_int32_be(ctx, out, pwg ? pwg->compression : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->row_count : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->row_feed : 0);
//	fz_write_int32_be(ctx, out, pwg ? pwg->row_step : 0);
//	fz_write_int32_be(ctx, out, bpp <= 8 ? 1 : (bpp>>8)); /* Num Colors */
//	for (i=424; i < 452; i += 4)
//		fz_write_data(ctx, out, zero, 4);
//	fz_write_int32_be(ctx, out, 1); /* TotalPageCount */
//	fz_write_int32_be(ctx, out, 1); /* CrossFeedTransform */
//	fz_write_int32_be(ctx, out, 1); /* FeedTransform */
//	fz_write_int32_be(ctx, out, 0); /* ImageBoxLeft */
//	fz_write_int32_be(ctx, out, 0); /* ImageBoxTop */
//	fz_write_int32_be(ctx, out, w); /* ImageBoxRight */
//	fz_write_int32_be(ctx, out, h); /* ImageBoxBottom */
//	for (i=480; i < 1668; i += 4)
//		fz_write_data(ctx, out, zero, 4);
//	fz_write_data(ctx, out, pwg ? pwg->rendering_intent : zero, 64);
//	fz_write_data(ctx, out, pwg ? pwg->page_size_name : zero, 64);
//}
//
///*
//	Output a page to a pwg stream to follow a header, or other pages.
//*/
//void
//fz_write_pixmap_as_pwg_page(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap, const fz_pwg_options *pwg)
//{
//	fz_band_writer *writer = fz_new_pwg_band_writer(ctx, out, pwg);
//
//	fz_try(ctx)
//	{
//		fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps);
//		fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
//		fz_close_band_writer(ctx, writer);
//	}
//	fz_always(ctx)
//		fz_drop_band_writer(ctx, writer);
//	fz_catch(ctx)
//		fz_rethrow(ctx);
//}
//
///*
//	Output a bitmap page to a pwg stream to follow a header, or other pages.
//*/
//void
//fz_write_bitmap_as_pwg_page(fz_context *ctx, fz_output *out, const fz_bitmap *bitmap, const fz_pwg_options *pwg)
//{
//	fz_band_writer *writer = fz_new_mono_pwg_band_writer(ctx, out, pwg);
//
//	fz_try(ctx)
//	{
//		fz_write_header(ctx, writer, bitmap->w, bitmap->h, bitmap->n, 0, bitmap->xres, bitmap->yres, 0, NULL, NULL);
//		fz_write_band(ctx, writer, bitmap->stride, bitmap->h, bitmap->samples);
//		fz_close_band_writer(ctx, writer);
//	}
//	fz_always(ctx)
//		fz_drop_band_writer(ctx, writer);
//	fz_catch(ctx)
//		fz_rethrow(ctx);
//}
//
//void
//fz_write_pixmap_as_pwg(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap, const fz_pwg_options *pwg)
//{
//	fz_write_pwg_file_header(ctx, out);
//	fz_write_pixmap_as_pwg_page(ctx, out, pixmap, pwg);
//}
//
//void
//fz_write_bitmap_as_pwg(fz_context *ctx, fz_output *out, const fz_bitmap *bitmap, const fz_pwg_options *pwg)
//{
//	fz_write_pwg_file_header(ctx, out);
//	fz_write_bitmap_as_pwg_page(ctx, out, bitmap, pwg);
//}
//
///*
//	Save a pixmap as a pwg
//
//	filename: The filename to save as (including extension).
//
//	append: If non-zero, then append a new page to existing file.
//
//	pwg: NULL, or a pointer to an options structure (initialised to zero
//	before being filled in, for future expansion).
//*/
//void
//fz_save_pixmap_as_pwg(fz_context *ctx, fz_pixmap *pixmap, char *filename, int append, const fz_pwg_options *pwg)
//{
//	fz_output *out = fz_new_output_with_path(ctx, filename, append);
//	fz_try(ctx)
//	{
//		if (!append)
//			fz_write_pwg_file_header(ctx, out);
//		fz_write_pixmap_as_pwg_page(ctx, out, pixmap, pwg);
//		fz_close_output(ctx, out);
//	}
//	fz_always(ctx)
//		fz_drop_output(ctx, out);
//	fz_catch(ctx)
//		fz_rethrow(ctx);
//}
//
///*
//	Save a bitmap as a pwg
//
//	filename: The filename to save as (including extension).
//
//	append: If non-zero, then append a new page to existing file.
//
//	pwg: NULL, or a pointer to an options structure (initialised to zero
//	before being filled in, for future expansion).
//*/
//void
//fz_save_bitmap_as_pwg(fz_context *ctx, fz_bitmap *bitmap, char *filename, int append, const fz_pwg_options *pwg)
//{
//	fz_output *out = fz_new_output_with_path(ctx, filename, append);
//	fz_try(ctx)
//	{
//		if (!append)
//			fz_write_pwg_file_header(ctx, out);
//		fz_write_bitmap_as_pwg_page(ctx, out, bitmap, pwg);
//		fz_close_output(ctx, out);
//	}
//	fz_always(ctx)
//		fz_drop_output(ctx, out);
//	fz_catch(ctx)
//		fz_rethrow(ctx);
//}
//
//static void
//pwg_write_mono_header(fz_context *ctx, fz_band_writer *writer_, fz_colorspace *cs)
//{
//	pwg_band_writer *writer = (pwg_band_writer *)writer_;
//
//	pwg_page_header(ctx, writer->super.out, &writer->pwg,
//		writer->super.xres, writer->super.yres, writer->super.w, writer->super.h, 1);
//}
//
//static void
//pwg_write_mono_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *samples)
//{
//	pwg_band_writer *writer = (pwg_band_writer *)writer_;
//	fz_output *out = writer->super.out;
//	int w = writer->super.w;
//	int h = writer->super.h;
//	const unsigned char *sp;
//	int y, x;
//	int byte_width;
//
//	/* Now output the actual bitmap, using a packbits like compression */
//	sp = samples;
//	byte_width = (w+7)/8;
//	y = 0;
//	while (y < band_height)
//	{
//		int yrep;
//
//		assert(sp == samples + y * stride);
//
//		/* Count the number of times this line is repeated */
//		for (yrep = 1; yrep < 256 && y+yrep < h; yrep++)
//		{
//			if (memcmp(sp, sp + yrep * stride, byte_width) != 0)
//				break;
//		}
//		fz_write_byte(ctx, out, yrep-1);
//
//		/* Encode the line */
//		x = 0;
//		while (x < byte_width)
//		{
//			int d;
//
//			assert(sp == samples + y * stride + x);
//
//			/* How far do we have to look to find a repeated value? */
//			for (d = 1; d < 128 && x+d < byte_width; d++)
//			{
//				if (sp[d-1] == sp[d])
//					break;
//			}
//			if (d == 1)
//			{
//				int xrep;
//
//				/* We immediately have a repeat (or we've hit
//				 * the end of the line). Count the number of
//				 * times this value is repeated. */
//				for (xrep = 1; xrep < 128 && x+xrep < byte_width; xrep++)
//				{
//					if (sp[0] != sp[xrep])
//						break;
//				}
//				fz_write_byte(ctx, out, xrep-1);
//				fz_write_data(ctx, out, sp, 1);
//				sp += xrep;
//				x += xrep;
//			}
//			else
//			{
//				fz_write_byte(ctx, out, 257-d);
//				fz_write_data(ctx, out, sp, d);
//				sp += d;
//				x += d;
//			}
//		}
//
//		/* Move to the next line */
//		sp += stride*yrep - byte_width;
//		y += yrep;
//	}
//}
//
///*
//	Generate a new band writer for
//	PWG format images.
//*/
//fz_band_writer *fz_new_mono_pwg_band_writer(fz_context *ctx, fz_output *out, const fz_pwg_options *pwg)
//{
//	pwg_band_writer *writer = fz_new_band_writer(ctx, pwg_band_writer, out);
//
//	writer->super.header = pwg_write_mono_header;
//	writer->super.band = pwg_write_mono_band;
//	if (pwg)
//		writer->pwg = *pwg;
//	else
//		memset(&writer->pwg, 0, sizeof(writer->pwg));
//
//	return &writer->super;
//}
//
//static void
//pwg_write_header(fz_context *ctx, fz_band_writer *writer_, fz_colorspace *cs)
//{
//	pwg_band_writer *writer = (pwg_band_writer *)writer_;
//	int n = writer->super.n;
//
//	if (writer->super.s != 0)
//		fz_throw(ctx, FZ_ERROR_ARGUMENT, "PWG band writer cannot cope with spot colors");
//	if (writer->super.alpha != 0)
//		fz_throw(ctx, FZ_ERROR_ARGUMENT, "PWG band writer cannot cope with alpha");
//	if (n != 1 && n != 3 && n != 4)
//		fz_throw(ctx, FZ_ERROR_ARGUMENT, "pixmap must be grayscale, rgb or cmyk to write as pwg");
//
//	pwg_page_header(ctx, writer->super.out, &writer->pwg,
//			writer->super.xres, writer->super.yres, writer->super.w, writer->super.h, n*8);
//}
//
//static void
//pwg_write_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *samples)
//{
//	pwg_band_writer *writer = (pwg_band_writer *)writer_;
//	fz_output *out = writer->super.out;
//	int w = writer->super.w;
//	int h = writer->super.h;
//	const unsigned char *sp = samples;
//	int n = writer->super.n;
//	int ss = w * n;
//	int y, x;
//
//	/* Now output the actual bitmap, using a packbits like compression */
//	y = 0;
//	while (y < h)
//	{
//		int yrep;
//
//		assert(sp == samples + y * stride);
//
//		/* Count the number of times this line is repeated */
//		for (yrep = 1; yrep < 256 && y+yrep < h; yrep++)
//		{
//			if (memcmp(sp, sp + yrep * stride, ss) != 0)
//				break;
//		}
//		fz_write_byte(ctx, out, yrep-1);
//
//		/* Encode the line */
//		x = 0;
//		while (x < w)
//		{
//			int d;
//
//			assert(sp == samples + y * stride + x * n);
//
//			/* How far do we have to look to find a repeated value? */
//			for (d = 1; d < 128 && x+d < w; d++)
//			{
//				if (memcmp(sp + (d-1)*n, sp + d*n, n) == 0)
//					break;
//			}
//			if (d == 1)
//			{
//				int xrep;
//
//				/* We immediately have a repeat (or we've hit
//				 * the end of the line). Count the number of
//				 * times this value is repeated. */
//				for (xrep = 1; xrep < 128 && x+xrep < w; xrep++)
//				{
//					if (memcmp(sp, sp + xrep*n, n) != 0)
//						break;
//				}
//				fz_write_byte(ctx, out, xrep-1);
//				fz_write_data(ctx, out, sp, n);
//				sp += n*xrep;
//				x += xrep;
//			}
//			else
//			{
//				fz_write_byte(ctx, out, 257-d);
//				x += d;
//				while (d > 0)
//				{
//					fz_write_data(ctx, out, sp, n);
//					sp += n;
//					d--;
//				}
//			}
//		}
//
//		/* Move to the next line */
//		sp += stride*(yrep-1);
//		y += yrep;
//	}
//}
//
///*
//	Generate a new band writer for
//	contone PWG format images.
//*/
//fz_band_writer *fz_new_pwg_band_writer(fz_context *ctx, fz_output *out, const fz_pwg_options *pwg)
//{
//	pwg_band_writer *writer = fz_new_band_writer(ctx, pwg_band_writer, out);
//
//	writer->super.header = pwg_write_header;
//	writer->super.band = pwg_write_band;
//	if (pwg)
//		writer->pwg = *pwg;
//	else
//		memset(&writer->pwg, 0, sizeof(writer->pwg));
//
//	return &writer->super;
//}
//
///* High-level document writer interface */
//
//const char *fz_pwg_write_options_usage =
//	"PWG output options:\n"
//	"\tmedia_class=<string>: set the media_class field\n"
//	"\tmedia_color=<string>: set the media_color field\n"
//	"\tmedia_type=<string>: set the media_type field\n"
//	"\toutput_type=<string>: set the output_type field\n"
//	"\trendering_intent=<string>: set the rendering_intent field\n"
//	"\tpage_size_name=<string>: set the page_size_name field\n"
//	"\tadvance_distance=<int>: set the advance_distance field\n"
//	"\tadvance_media=<int>: set the advance_media field\n"
//	"\tcollate=<int>: set the collate field\n"
//	"\tcut_media=<int>: set the cut_media field\n"
//	"\tduplex=<int>: set the duplex field\n"
//	"\tinsert_sheet=<int>: set the insert_sheet field\n"
//	"\tjog=<int>: set the jog field\n"
//	"\tleading_edge=<int>: set the leading_edge field\n"
//	"\tmanual_feed=<int>: set the manual_feed field\n"
//	"\tmedia_position=<int>: set the media_position field\n"
//	"\tmedia_weight=<int>: set the media_weight field\n"
//	"\tmirror_print=<int>: set the mirror_print field\n"
//	"\tnegative_print=<int>: set the negative_print field\n"
//	"\tnum_copies=<int>: set the num_copies field\n"
//	"\torientation=<int>: set the orientation field\n"
//	"\toutput_face_up=<int>: set the output_face_up field\n"
//	"\tpage_size_x=<int>: set the page_size_x field\n"
//	"\tpage_size_y=<int>: set the page_size_y field\n"
//	"\tseparations=<int>: set the separations field\n"
//	"\ttray_switch=<int>: set the tray_switch field\n"
//	"\ttumble=<int>: set the tumble field\n"
//	"\tmedia_type_num=<int>: set the media_type_num field\n"
//	"\tcompression=<int>: set the compression field\n"
//	"\trow_count=<int>: set the row_count field\n"
//	"\trow_feed=<int>: set the row_feed field\n"
//	"\trow_step=<int>: set the row_step field\n"
//	"\n";
//
//static void
//warn_if_long(fz_context *ctx, const char *str, size_t ret)
//{
//	if (ret > 0)
//		fz_warn(ctx, "Option %s is too long, truncated.", str);
//}
//
//fz_pwg_options *
//fz_parse_pwg_options(fz_context *ctx, fz_pwg_options *opts, const char *args)
//{
//	const char *val;
//
//	memset(opts, 0, sizeof *opts);
//
//	if (fz_has_option(ctx, args, "media_class", &val))
//		warn_if_long(ctx, "media_class", fz_copy_option(ctx, val, opts->media_class, 64));
//	if (fz_has_option(ctx, args, "media_color", &val))
//		warn_if_long(ctx, "media_color", fz_copy_option(ctx, val, opts->media_color, 64));
//	if (fz_has_option(ctx, args, "media_type", &val))
//		warn_if_long(ctx, "media_type", fz_copy_option(ctx, val, opts->media_type, 64));
//	if (fz_has_option(ctx, args, "output_type", &val))
//		warn_if_long(ctx, "output_type", fz_copy_option(ctx, val, opts->output_type, 64));
//	if (fz_has_option(ctx, args, "rendering_intent", &val))
//		warn_if_long(ctx, "rendering_intent", fz_copy_option(ctx, val, opts->rendering_intent, 64));
//	if (fz_has_option(ctx, args, "page_size_name", &val))
//		warn_if_long(ctx, "page_size_name", fz_copy_option(ctx, val, opts->page_size_name, 64));
//	if (fz_has_option(ctx, args, "advance_distance", &val))
//		opts->advance_distance = fz_atoi(val);
//	if (fz_has_option(ctx, args, "advance_media", &val))
//		opts->advance_media = fz_atoi(val);
//	if (fz_has_option(ctx, args, "collate", &val))
//		opts->collate = fz_atoi(val);
//	if (fz_has_option(ctx, args, "cut_media", &val))
//		opts->cut_media = fz_atoi(val);
//	if (fz_has_option(ctx, args, "duplex", &val))
//		opts->duplex = fz_atoi(val);
//	if (fz_has_option(ctx, args, "insert_sheet", &val))
//		opts->insert_sheet = fz_atoi(val);
//	if (fz_has_option(ctx, args, "jog", &val))
//		opts->jog = fz_atoi(val);
//	if (fz_has_option(ctx, args, "leading_edge", &val))
//		opts->leading_edge = fz_atoi(val);
//	if (fz_has_option(ctx, args, "manual_feed", &val))
//		opts->manual_feed = fz_atoi(val);
//	if (fz_has_option(ctx, args, "media_position", &val))
//		opts->media_position = fz_atoi(val);
//	if (fz_has_option(ctx, args, "media_weight", &val))
//		opts->media_weight = fz_atoi(val);
//	if (fz_has_option(ctx, args, "mirror_print", &val))
//		opts->mirror_print = fz_atoi(val);
//	if (fz_has_option(ctx, args, "negative_print", &val))
//		opts->negative_print = fz_atoi(val);
//	if (fz_has_option(ctx, args, "num_copies", &val))
//		opts->num_copies = fz_atoi(val);
//	if (fz_has_option(ctx, args, "orientation", &val))
//		opts->orientation = fz_atoi(val);
//	if (fz_has_option(ctx, args, "output_face_up", &val))
//		opts->output_face_up = fz_atoi(val);
//	if (fz_has_option(ctx, args, "page_size_x", &val))
//		opts->PageSize[0] = fz_atoi(val);
//	if (fz_has_option(ctx, args, "page_size_y", &val))
//		opts->PageSize[1] = fz_atoi(val);
//	if (fz_has_option(ctx, args, "separations", &val))
//		opts->separations = fz_atoi(val);
//	if (fz_has_option(ctx, args, "tray_switch", &val))
//		opts->tray_switch = fz_atoi(val);
//	if (fz_has_option(ctx, args, "tumble", &val))
//		opts->tumble = fz_atoi(val);
//	if (fz_has_option(ctx, args, "media_type_num", &val))
//		opts->media_type_num = fz_atoi(val);
//	if (fz_has_option(ctx, args, "compression", &val))
//		opts->compression = fz_atoi(val);
//	if (fz_has_option(ctx, args, "row_count", &val))
//		opts->row_count = fz_atoi(val);
//	if (fz_has_option(ctx, args, "row_feed", &val))
//		opts->row_feed = fz_atoi(val);
//	if (fz_has_option(ctx, args, "row_step", &val))
//		opts->row_step = fz_atoi(val);
//
//	return opts;
//}
//
//typedef struct
//{
//	fz_document_writer super;
//	fz_draw_options draw;
//	fz_pwg_options pwg;
//	int mono;
//	fz_pixmap *pixmap;
//	fz_output *out;
//} fz_pwg_writer;
//
//static fz_device *
//pwg_begin_page(fz_context *ctx, fz_document_writer *wri_, fz_rect mediabox)
//{
//	fz_pwg_writer *wri = (fz_pwg_writer*)wri_;
//	return fz_new_draw_device_with_options(ctx, &wri->draw, mediabox, &wri->pixmap);
//}
//
//static void
//pwg_end_page(fz_context *ctx, fz_document_writer *wri_, fz_device *dev)
//{
//	fz_pwg_writer *wri = (fz_pwg_writer*)wri_;
//	fz_bitmap *bitmap = NULL;
//
//	fz_var(bitmap);
//
//	fz_try(ctx)
//	{
//		fz_close_device(ctx, dev);
//		if (wri->mono)
//		{
//			bitmap = fz_new_bitmap_from_pixmap(ctx, wri->pixmap, NULL);
//			fz_write_bitmap_as_pwg_page(ctx, wri->out, bitmap, &wri->pwg);
//		}
//		else
//		{
//			fz_write_pixmap_as_pwg_page(ctx, wri->out, wri->pixmap, &wri->pwg);
//		}
//	}
//	fz_always(ctx)
//	{
//		fz_drop_device(ctx, dev);
//		fz_drop_bitmap(ctx, bitmap);
//		fz_drop_pixmap(ctx, wri->pixmap);
//		wri->pixmap = NULL;
//	}
//	fz_catch(ctx)
//	{
//		fz_rethrow(ctx);
//	}
//}
//
//static void
//pwg_close_writer(fz_context *ctx, fz_document_writer *wri_)
//{
//	fz_pwg_writer *wri = (fz_pwg_writer*)wri_;
//	fz_close_output(ctx, wri->out);
//}
//
//static void
//pwg_drop_writer(fz_context *ctx, fz_document_writer *wri_)
//{
//	fz_pwg_writer *wri = (fz_pwg_writer*)wri_;
//	fz_drop_pixmap(ctx, wri->pixmap);
//	fz_drop_output(ctx, wri->out);
//}
//
//fz_document_writer *
//fz_new_pwg_writer_with_output(fz_context *ctx, fz_output *out, const char *options)
//{
//	fz_pwg_writer *wri = NULL;
//	const char *val;
//
//	fz_var(wri);
//
//	fz_try(ctx)
//	{
//		wri = fz_new_derived_document_writer(ctx, fz_pwg_writer, pwg_begin_page, pwg_end_page, pwg_close_writer, pwg_drop_writer);
//		fz_parse_draw_options(ctx, &wri->draw, options);
//		fz_parse_pwg_options(ctx, &wri->pwg, options);
//		if (fz_has_option(ctx, options, "colorspace", &val))
//			if (fz_option_eq(val, "mono"))
//				wri->mono = 1;
//		wri->out = out;
//		fz_write_pwg_file_header(ctx, wri->out);
//	}
//	fz_catch(ctx)
//	{
//		fz_drop_output(ctx, out);
//		fz_free(ctx, wri);
//		fz_rethrow(ctx);
//	}
//
//	return (fz_document_writer*)wri;
//}
//
//fz_document_writer *
//fz_new_pwg_writer(fz_context *ctx, const char *path, const char *options)
//{
//	fz_output *out = fz_new_output_with_path(ctx, path ? path : "out.pwg", 0);
//	return fz_new_pwg_writer_with_output(ctx, out, options);
//}
